Hall Effect Sensor: Testing and Inspection
Hall sending unit, checkingWork sequence
Note: Ignition coil wire from distributor must always be grounded with jumper wire when checking Hall sending unit.
- Remove protective cover from Hall sending unit connector on ignition distributor and unplug connector from unit (arrow)
- Connect voltmeter to terminals 1 and 3 of connector D
- Switch ignition ON
^ Specifications: minimum 9 V
If specifications NOT OK
- Check for open circuit in wiring to Hall sending unit according to current flow diagram
If specification OK
- Switch ignition OFF
- Move back protective cover on Hall sending unit connector
- Connect voltmeter across wires for terminals 1 and 2
- Plug connector back into Hall sending unit on distributor
- Switch ignition ON
- Remove distributor cap rotor and dust cover
Note: Distributor cap retaining clips must not interfere with Hall sending unit during test.
- Using tool 2079, turn crankshaft until trigger wheel window (arrow) is clear of Hall sender
- Check voltage reading
^ Specification: minimum 4.0 V
- Using tool 2079, turn crankshaft until trigger wheel window (arrow) is fully aligned with Hall sender
- Check voltage reading
^ Specification: 0-0.5 V
- Switch ignition OFF
If specification NOT OK
- Replace Hall sending unit
If specification OK
- Check wiring for open circuit between Hall sending unit and control unit connector
- Remove control unit cover located in footwell on passenger side of vehicle
- Unplug control unit connector
- Use ohmmeter to check continuity between terminals of Hall sender connector D and control unit connector A
^ Connector D terminal (1) and control unit connector A terminal (23)
^ Connector D terminal (2) and control unit connector A terminal (27)
^ Connector D terminal (3) and control unit connector A terminal (25)
^ Each specification: approx. 0 ohm
If NOT OK
- Check for open circuit in wiring between connectors A and D according to current flow diagram
If wiring OK
- Replace ignition control unit